06-15-2018, 10:21 AM
That is indeed some awesome reverse engineering!
There's something interesting going on with the Key. 3DES has three keys and performs DES on the plaintext with encryption, decryption and encryption. Each operation using one of the keys.
To be exact it is enc(key3, dec(key2, enc(key1, pt))). Since key2 and key3 are the same (80808080808080) it cancels itself out.
Or in other words: we are left with DES and the key1 (61d0e54954733b80).
There's something interesting going on with the Key. 3DES has three keys and performs DES on the plaintext with encryption, decryption and encryption. Each operation using one of the keys.
To be exact it is enc(key3, dec(key2, enc(key1, pt))). Since key2 and key3 are the same (80808080808080) it cancels itself out.
Or in other words: we are left with DES and the key1 (61d0e54954733b80).